MARYSVILLE, Wash. — A student opened fire Friday in a high school cafeteria north of Seattle, killing at least one person and shooting several others in the head, officials said. The gunman also died in the attack.

Students in the cafeteria said the gunman stared at the students as he shot them. They described a chaotic scene at Marysville Pilchuck High School, as panicked students ran for safety.

Student Alan Perez told KING-TV he was eating his lunch near the gunman when he heard the shots.

SEATTLE — Alaska Airlines operations slowly were returning to normal Monday afternoon after a fiber-optic outage shut down its ticketing system for five hours, cancelling flights in Seattle and Los Angeles and causing delays across the airline’s 64-airport network.

The problems started shortly before 8 a.m. when computers the airline uses to check in passengers went down, forcing employees to board travelers manually — in some instances sticking handwritten flight numbers to computer monitors.